This study discovered the impact of high-tunnel (i.e.,
unheated
greenhouse) and open-field production on two industrial hemp cultivars
(SB1 and CJ2) over their yield parameters, cannabinoid development,
and volatile profiles. Development of neutral cannabinoids (CBD, THC,
and CBC), acidic cannabinoids (CBDA, THCA, and CBCA), and total cannabinoids
during floral maturation were investigated. The volatile profiles
of hemp flowers were holistically compared via HS-SPME-GC/MS. Findings
indicated a high tunnel as an efficient practice for achieving greater
total weight, stem number, and caliper, especially in the SB1 cultivar.
Harvesting high-tunnel-grown SB1 cultivars during early flower maturation
could obtain a high CBD yield while complying with THC regulations.
Considering the volatile profiles, hemp flowers mainly consisted of
mono- and sesquiterpenoids, as well as oxygenated mono- and sesquiterpenoids.
Volatile analysis revealed the substantial impact of cultivars on
the volatile profile compared to the production systems.